Wrench extension



FIG. 1 is a perspective view of a wrench extension showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a front elevational view thereof.

The dotted line showing of a wrench in FIG. 2 is for illustrative purposes and forms no part of the inventive design. 

The ornamental design for a wrench extension, as shown and described. 